Question

Please answer the following Question (35 Points)

Answer 1

Answer:

$2r-2s$

Step-by-step explanation:

Start by removing the parentheses:

$(r-s)-(s-t)-(t-r)\\r-s-(s)-(-t)-t-(-r)$

Note that two negatives make a positive.

$r-s-s+t-t+r$

Combine like terms

$r+r-s-s+t-t\\2r-2s$